Lighting device



FIG. 1 is a front perspective view of a lighting device showing the new design;

FIG. 2 is a rear perspective thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is an opposite side elevational view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines and unshaded areas in the figures illustrate portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a lighting device, as shown and described. 